GM2
CAT.OP.MPA.303 In-flight check of the landing distance at time of arrival —
aeroplanes
ED Decision 2021/005/R
RUNWAY CONDITION CONSIDERATIONS
When available for the portion of the runway that will be used for landing, the following elements are relevant for consideration:
(a) RWYCC;
(b) expected runway conditions (contaminant type and depth);
(c) other information contained in the RCR related to the following elements:
(1) width of the runway to which the RWYCC applies if less than the published runway width;
(2) reduced runway length;
(3) drifting snow on the runway;
(4) loose sand on the runway;
(5) chemical treatment on the runway;
(6) snowbanks on the runway;
(7) snowbanks on taxiways;
(8) snowbanks adjacent to the runway;
(9) taxiway conditions;
(10) apron conditions;
(11) State approved and published use of measured friction coefficient;
(12) plain language remarks;
(d) AIREP of braking action.
AIRCRAFT PERFORMANCE CONSIDERATIONS
The following elements may impact landing distance calculations:
(a) runway slope;
(b) aerodrome elevation;
(c) wind;
(d) temperature;
(e) aeroplane mass and configuration;
(f) approach speed at threshold;
(g) eventual adjustments to the landing distance, such as autoland; and
(h) planned use of available and operative aeroplane ground deceleration devices.
AUTOBRAKE USAGE
While autobrakes are a part of the aeroplane’s landing configuration, the landing distance assessment at the time of arrival is not intended to force a higher-than-necessary autobrake selection. For operations where the RWYCC is 6 or 5, if the manual braking distance provides at least 15 % safety margin, then the braking technique may include a combination of autobrakes and manual braking even if the selected autobrake landing data does not provide a 15 % safety margin.
GENERAL
Background information and further guidance on the in-flight check of the LDTA may be found in ICAO Doc 10064 ‘Aeroplane Performance Manual’.
EASA regulations require pilots to assess landing distance upon arrival, considering runway conditions (contamination, width, length, snow, friction), aircraft performance (slope, elevation, wind, temperature, mass, speed, deceleration devices), and braking effectiveness. A safety margin is needed, but autobrake usage can be optimized based on runway conditions.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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